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Alan Koch
Lifting Witt Subgroups to Characteristic Zero
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| Published: |
August 31, 1998 |
| Keywords: |
Group Schemes, Dieudonné Modules, Witt Vectors |
| Subject: |
14L |
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Abstract
Let k be a perfect field of characteristic p>0.
Using Dieudonné modules, we describe the exact conditions
under which a Witt subgroup, i.e., a finite subgroup scheme of Wn,
lifts to the ring of Witt Vectors W(k).
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| Author information
Department of Mathematics, Hope College, P.O. Box 9000, Holland, MI 49424-9000
Current Address: Department of Mathematics, St. Edward's University, 3001 S. Congress Ave., Austin, TX 78704-6489
alank@admin.stedwards.edu
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